convert markdown copyright TAB chars into SPACE chars

While not strictly necessary, replacing the two ASCII tab characters
in the markdown copyright comment makes it easier to detect problematic
TAB indentation within markdown files.

After this commit, only 90 markdown files have leading ASCII TAB
characters.  And again, while not strictly necessary, we can consider
running expand on those 90 markdown files to see what effect that
might have on the HTML files they produce.

Replace leading ASCII TAB characters with multiples of 8 ASCII SPACE
characters (the default action of the `expand(1)` tool) might have
an negative effect on some HTML formatting where **hack-a-round**
formatting was attempted to fix broken indentation caused by
problematic ASCII TAB characters.

Think of this as a baseline for evaluating leading
TAB characters within markdown files.

TODO: Consider either using `expand(1)` to replace leading ASCII
TAB characters with multiples of 8 ASCII SPACE characters AND/OR
modifying the appropriate `bin` tool to convert leading ASCII TAB
characters into multiples of 8 ASCII SPACE characters.

2019/README.md

@@ -83,10 +83,10 @@ See also [the IOCCC FAQ](../faq.html) for additional information on the IOCCC.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/adamovsky/README.md

@@ -299,10 +299,10 @@ be applied.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/adamovsky/index.html

@@ -658,11 +658,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

2019/burton/README.md

@@ -112,10 +112,10 @@ This exercise left to the reader.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/burton/index.html

@@ -520,11 +520,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

2019/ciura/README.md

@@ -213,10 +213,10 @@ compilation with `gcc -std=c90`, add `-Wno-format` to
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/ciura/index.html

@@ -610,11 +610,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

2019/diels-grabsch1/README.md

@@ -71,10 +71,10 @@ GCC and Clang even with `-Wextra and -Weverything`.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/diels-grabsch1/index.html

@@ -495,11 +495,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

2019/diels-grabsch2/README.md

@@ -190,10 +190,10 @@ doesn't have to mean anything.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/diels-grabsch2/index.html

@@ -598,11 +598,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

2019/dogon/README.md

@@ -264,10 +264,10 @@ next generation bits of the input 8x8 !
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/dogon/index.html

@@ -662,11 +662,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

2019/duble/README.md

@@ -256,10 +256,10 @@ size limit with this little change.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/duble/index.html

@@ -613,11 +613,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

2019/endoh/README.md

@@ -143,10 +143,10 @@ By using this, you can confirm that it is actually a quine.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/endoh/index.html

@@ -536,11 +536,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

2019/giles/README.md

@@ -239,10 +239,10 @@ for(s=0;s<f[13];s++)`
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/giles/index.html

@@ -650,11 +650,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

2019/index.html

@@ -499,11 +499,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

2019/karns/README.md

@@ -124,10 +124,10 @@ not encountered this myself).
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/karns/index.html

@@ -525,11 +525,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

2019/lynn/README.md

@@ -320,10 +320,10 @@ works](https://crypto.stanford.edu/~blynn/compiler/ioccc.html).
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/lynn/index.html

@@ -667,11 +667,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

2019/mills/README.md

@@ -710,10 +710,10 @@ The list of hyperparameters follows:
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/mills/index.html

@@ -964,11 +964,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

2019/poikola/README.md

@@ -298,10 +298,10 @@ interruptions during the coding phase.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/poikola/index.html

@@ -636,11 +636,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->
 

2019/yang/README.md

@@ -222,10 +222,10 @@ the same name, the character who is highly skilled in writing letters.
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->

2019/yang/index.html

@@ -589,11 +589,11 @@ Jump to: <a href="#">top</a>
 
     You are free to share and adapt this file under the terms of this license:
 
-	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
+        Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 
     For more information, see:
 
-	https://creativecommons.org/licenses/by-sa/4.0/
+        https://creativecommons.org/licenses/by-sa/4.0/
 
 -->